mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-23 19:20:53 +08:00
648 lines
22 KiB
C++
648 lines
22 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#if !defined(_WIN32)
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#include <dirent.h>
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#endif //!defined(_WIN32)
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#include <stdio.h>
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#include <sys/stat.h>
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#include <algorithm>
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#include <iomanip>
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#include "Common/config.h"
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#include "strCoding.h"
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#include "HttpSession.h"
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#include "Util/base64.h"
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#include "Util/SHA1.h"
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using namespace toolkit;
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namespace mediakit {
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HttpSession::HttpSession(const Socket::Ptr &pSock) : TcpSession(pSock) {
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TraceP(this);
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GET_CONFIG(uint32_t,keep_alive_sec,Http::kKeepAliveSecond);
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pSock->setSendTimeOutSecond(keep_alive_sec);
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//起始接收buffer缓存设置为4K，节省内存
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pSock->setReadBuffer(std::make_shared<BufferRaw>(4 * 1024));
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}
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HttpSession::~HttpSession() {
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TraceP(this);
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}
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void HttpSession::Handle_Req_HEAD(int64_t &content_len){
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//暂时全部返回200 OK，因为HTTP GET存在按需生成流的操作，所以不能按照HTTP GET的流程返回
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//如果直接返回404，那么又会导致按需生成流的逻辑失效，所以HTTP HEAD在静态文件或者已存在资源时才有效
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//对于按需生成流的直播场景并不适用
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sendResponse("200 OK", true);
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}
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int64_t HttpSession::onRecvHeader(const char *header,uint64_t len) {
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typedef void (HttpSession::*HttpCMDHandle)(int64_t &);
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static unordered_map<string, HttpCMDHandle> s_func_map;
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static onceToken token([]() {
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s_func_map.emplace("GET",&HttpSession::Handle_Req_GET);
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s_func_map.emplace("POST",&HttpSession::Handle_Req_POST);
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s_func_map.emplace("HEAD",&HttpSession::Handle_Req_HEAD);
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}, nullptr);
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_parser.Parse(header);
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urlDecode(_parser);
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string cmd = _parser.Method();
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auto it = s_func_map.find(cmd);
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if (it == s_func_map.end()) {
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WarnL << "不支持该命令:" << cmd;
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sendResponse("405 Not Allowed", true);
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return 0;
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}
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//跨域
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_origin = _parser["Origin"];
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//默认后面数据不是content而是header
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int64_t content_len = 0;
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auto &fun = it->second;
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try {
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(this->*fun)(content_len);
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}catch (exception &ex){
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shutdown(SockException(Err_shutdown,ex.what()));
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}
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//清空解析器节省内存
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_parser.Clear();
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//返回content长度
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return content_len;
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}
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void HttpSession::onRecvContent(const char *data,uint64_t len) {
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if(_contentCallBack){
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if(!_contentCallBack(data,len)){
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_contentCallBack = nullptr;
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}
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}
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}
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void HttpSession::onRecv(const Buffer::Ptr &pBuf) {
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_ticker.resetTime();
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input(pBuf->data(),pBuf->size());
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}
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void HttpSession::onError(const SockException& err) {
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if(_is_flv_stream){
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uint64_t duration = _ticker.createdTime()/1000;
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//flv播放器
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WarnP(this) << "FLV播放器("
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<< _mediaInfo._vhost << "/"
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<< _mediaInfo._app << "/"
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<< _mediaInfo._streamid
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<< ")断开:" << err.what()
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<< ",耗时(s):" << duration;
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GET_CONFIG(uint32_t,iFlowThreshold,General::kFlowThreshold);
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if(_ui64TotalBytes > iFlowThreshold * 1024){
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NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastFlowReport, _mediaInfo, _ui64TotalBytes, duration , true, getIdentifier(), get_peer_ip(), get_peer_port());
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}
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return;
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}
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//http客户端
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if(_ticker.createdTime() < 10 * 1000){
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TraceP(this) << err.what();
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}else{
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WarnP(this) << err.what();
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}
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}
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void HttpSession::onManager() {
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GET_CONFIG(uint32_t,keepAliveSec,Http::kKeepAliveSecond);
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if(_ticker.elapsedTime() > keepAliveSec * 1000){
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//1分钟超时
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shutdown(SockException(Err_timeout,"session timeouted"));
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}
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}
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bool HttpSession::checkWebSocket(){
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auto Sec_WebSocket_Key = _parser["Sec-WebSocket-Key"];
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if(Sec_WebSocket_Key.empty()){
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return false;
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}
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auto Sec_WebSocket_Accept = encodeBase64(SHA1::encode_bin(Sec_WebSocket_Key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"));
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KeyValue headerOut;
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headerOut["Upgrade"] = "websocket";
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headerOut["Connection"] = "Upgrade";
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headerOut["Sec-WebSocket-Accept"] = Sec_WebSocket_Accept;
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if(!_parser["Sec-WebSocket-Protocol"].empty()){
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headerOut["Sec-WebSocket-Protocol"] = _parser["Sec-WebSocket-Protocol"];
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}
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auto res_cb = [this,headerOut](){
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_flv_over_websocket = true;
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sendResponse("101 Switching Protocols",false,nullptr,headerOut,nullptr, true);
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};
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//判断是否为websocket-flv
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if(checkLiveFlvStream(res_cb)){
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//这里是websocket-flv直播请求
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return true;
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}
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//如果checkLiveFlvStream返回false,则代表不是websocket-flv，而是普通的websocket连接
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if(!onWebSocketConnect(_parser)){
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sendResponse("501 Not Implemented",true, nullptr, headerOut);
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return true;
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}
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sendResponse("101 Switching Protocols",false, nullptr,headerOut);
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return true;
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}
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//http-flv 链接格式:http://vhost-url:port/app/streamid.flv?key1=value1&key2=value2
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//如果url(除去?以及后面的参数)后缀是.flv,那么表明该url是一个http-flv直播。
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bool HttpSession::checkLiveFlvStream(const function<void()> &cb){
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auto pos = strrchr(_parser.Url().data(),'.');
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if(!pos){
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//未找到".flv"后缀
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return false;
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}
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if(strcasecmp(pos,".flv") != 0){
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//未找到".flv"后缀
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return false;
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}
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//这是个.flv的流
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_mediaInfo.parse(string(RTMP_SCHEMA) + "://" + _parser["Host"] + _parser.FullUrl());
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if(_mediaInfo._app.empty() || _mediaInfo._streamid.size() < 5){
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//url不合法
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return false;
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}
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_mediaInfo._streamid.erase(_mediaInfo._streamid.size() - 4);//去除.flv后缀
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bool bClose = !strcasecmp(_parser["Connection"].data(),"close");
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weak_ptr<HttpSession> weakSelf = dynamic_pointer_cast<HttpSession>(shared_from_this());
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MediaSource::findAsync(_mediaInfo,weakSelf.lock(),[weakSelf,bClose,this,cb](const MediaSource::Ptr &src){
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auto strongSelf = weakSelf.lock();
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if(!strongSelf){
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//本对象已经销毁
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return;
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}
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auto rtmp_src = dynamic_pointer_cast<RtmpMediaSource>(src);
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if(!rtmp_src){
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//未找到该流
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sendNotFound(bClose);
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return;
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}
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//找到流了
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auto onRes = [this,rtmp_src,cb](const string &err){
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bool authSuccess = err.empty();
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if(!authSuccess){
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sendResponse("401 Unauthorized", true, nullptr, KeyValue(), std::make_shared<HttpStringBody>(err));
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return ;
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}
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if(!cb) {
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//找到rtmp源，发送http头，负载后续发送
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sendResponse("200 OK", false, "video/x-flv",KeyValue(),nullptr,true);
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}else{
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cb();
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}
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//http-flv直播牺牲延时提升发送性能
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setSocketFlags();
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try{
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start(getPoller(),rtmp_src);
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_is_flv_stream = true;
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}catch (std::exception &ex){
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//该rtmp源不存在
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shutdown(SockException(Err_shutdown,"rtmp mediasource released"));
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}
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};
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weak_ptr<HttpSession> weakSelf = dynamic_pointer_cast<HttpSession>(shared_from_this());
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Broadcast::AuthInvoker invoker = [weakSelf,onRes](const string &err){
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auto strongSelf = weakSelf.lock();
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if(!strongSelf){
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return;
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}
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strongSelf->async([weakSelf,onRes,err](){
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auto strongSelf = weakSelf.lock();
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if(!strongSelf){
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return;
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}
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onRes(err);
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});
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};
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auto flag = NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaPlayed,_mediaInfo,invoker,*this);
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if(!flag){
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//该事件无人监听,默认不鉴权
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onRes("");
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}
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});
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return true;
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}
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void HttpSession::Handle_Req_GET(int64_t &content_len) {
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Handle_Req_GET_l(content_len, true);
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}
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void HttpSession::Handle_Req_GET_l(int64_t &content_len, bool sendBody) {
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//先看看是否为WebSocket请求
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if(checkWebSocket()){
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content_len = -1;
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_contentCallBack = [this](const char *data,uint64_t len){
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WebSocketSplitter::decode((uint8_t *)data,len);
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//_contentCallBack是可持续的，后面还要处理后续数据
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return true;
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};
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return;
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}
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if(emitHttpEvent(false)){
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//拦截http api事件
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return;
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}
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if(checkLiveFlvStream()){
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//拦截http-flv播放器
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return;
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}
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bool bClose = !strcasecmp(_parser["Connection"].data(),"close");
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weak_ptr<HttpSession> weakSelf = dynamic_pointer_cast<HttpSession>(shared_from_this());
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HttpFileManager::onAccessPath(*this, _parser, [weakSelf, bClose](const string &status_code, const string &content_type,
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const StrCaseMap &responseHeader, const HttpBody::Ptr &body) {
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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return;
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}
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strongSelf->async([weakSelf, bClose, status_code, content_type, responseHeader, body]() {
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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return;
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}
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strongSelf->sendResponse(status_code.data(), bClose, content_type.data(), responseHeader, body);
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});
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});
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}
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static string dateStr() {
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char buf[64];
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time_t tt = time(NULL);
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strftime(buf, sizeof buf, "%a, %b %d %Y %H:%M:%S GMT", gmtime(&tt));
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return buf;
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}
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class AsyncSenderData {
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public:
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friend class AsyncSender;
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typedef std::shared_ptr<AsyncSenderData> Ptr;
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AsyncSenderData(const TcpSession::Ptr &session, const HttpBody::Ptr &body, bool close_when_complete) {
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_session = dynamic_pointer_cast<HttpSession>(session);
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_body = body;
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_close_when_complete = close_when_complete;
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}
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~AsyncSenderData() = default;
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private:
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std::weak_ptr<HttpSession> _session;
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HttpBody::Ptr _body;
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bool _close_when_complete;
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bool _read_complete = false;
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};
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class AsyncSender {
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public:
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typedef std::shared_ptr<AsyncSender> Ptr;
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static bool onSocketFlushed(const AsyncSenderData::Ptr &data) {
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if (data->_read_complete) {
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if (data->_close_when_complete) {
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//发送完毕需要关闭socket
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shutdown(data->_session.lock());
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}
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return false;
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}
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GET_CONFIG(uint32_t, sendBufSize, Http::kSendBufSize);
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data->_body->readDataAsync(sendBufSize, [data](const Buffer::Ptr &sendBuf) {
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auto session = data->_session.lock();
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if (!session) {
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//本对象已经销毁
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return;
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}
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session->async([data, sendBuf]() {
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auto session = data->_session.lock();
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if (!session) {
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//本对象已经销毁
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return;
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}
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onRequestData(data, session, sendBuf);
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}, false);
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});
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return true;
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}
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private:
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static void onRequestData(const AsyncSenderData::Ptr &data, const std::shared_ptr<HttpSession> &session, const Buffer::Ptr &sendBuf) {
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session->_ticker.resetTime();
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if (sendBuf && session->send(sendBuf) != -1) {
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//文件还未读完，还需要继续发送
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if (!session->isSocketBusy()) {
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//socket还可写，继续请求数据
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onSocketFlushed(data);
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}
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return;
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}
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//文件写完了
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data->_read_complete = true;
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if (!session->isSocketBusy() && data->_close_when_complete) {
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shutdown(session);
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}
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}
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static void shutdown(const std::shared_ptr<HttpSession> &session) {
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if(session){
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session->shutdown(SockException(Err_shutdown, StrPrinter << "close connection after send http body completed."));
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}
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}
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};
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static const string kDate = "Date";
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static const string kServer = "Server";
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static const string kConnection = "Connection";
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static const string kKeepAlive = "Keep-Alive";
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static const string kContentType = "Content-Type";
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static const string kContentLength = "Content-Length";
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static const string kAccessControlAllowOrigin = "Access-Control-Allow-Origin";
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static const string kAccessControlAllowCredentials = "Access-Control-Allow-Credentials";
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void HttpSession::sendResponse(const char *pcStatus,
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bool bClose,
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const char *pcContentType,
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const HttpSession::KeyValue &header,
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const HttpBody::Ptr &body,
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bool is_http_flv ){
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GET_CONFIG(string,charSet,Http::kCharSet);
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GET_CONFIG(uint32_t,keepAliveSec,Http::kKeepAliveSecond);
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//body默认为空
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int64_t size = 0;
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if (body && body->remainSize()) {
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//有body，获取body大小
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size = body->remainSize();
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}
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if(is_http_flv){
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//http-flv直播是Keep-Alive类型
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bClose = false;
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}else if(size >= INT64_MAX){
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//不固定长度的body，那么发送完body后应该关闭socket，以便浏览器做下载完毕的判断
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bClose = true;
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}
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HttpSession::KeyValue &headerOut = const_cast<HttpSession::KeyValue &>(header);
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headerOut.emplace(kDate, dateStr());
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headerOut.emplace(kServer, SERVER_NAME);
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headerOut.emplace(kConnection, bClose ? "close" : "keep-alive");
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if(!bClose){
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string keepAliveString = "timeout=";
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keepAliveString += to_string(keepAliveSec);
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keepAliveString += ", max=100";
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headerOut.emplace(kKeepAlive,std::move(keepAliveString));
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}
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if(!_origin.empty()){
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//设置跨域
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headerOut.emplace(kAccessControlAllowOrigin,_origin);
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headerOut.emplace(kAccessControlAllowCredentials, "true");
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}
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if(!is_http_flv && size >= 0 && size < INT64_MAX){
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//文件长度为固定值,且不是http-flv强制设置Content-Length
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headerOut[kContentLength] = to_string(size);
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}
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if(size && !pcContentType){
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//有body时，设置缺省类型
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pcContentType = "text/plain";
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}
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if(size && pcContentType){
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//有body时，设置文件类型
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string strContentType = pcContentType;
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strContentType += "; charset=";
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strContentType += charSet;
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headerOut.emplace(kContentType,std::move(strContentType));
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}
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//发送http头
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string str;
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str.reserve(256);
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str += "HTTP/1.1 " ;
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str += pcStatus ;
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str += "\r\n";
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for (auto &pr : header) {
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str += pr.first ;
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str += ": ";
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str += pr.second;
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str += "\r\n";
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}
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str += "\r\n";
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send(std::move(str));
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_ticker.resetTime();
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if(!size){
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//没有body
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if(bClose){
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shutdown(SockException(Err_shutdown,StrPrinter << "close connection after send http header completed with status code:" << pcStatus));
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}
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return;
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}
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GET_CONFIG(uint32_t, sendBufSize, Http::kSendBufSize);
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if(body->remainSize() > sendBufSize){
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//文件下载提升发送性能
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setSocketFlags();
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}
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//发送http body
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AsyncSenderData::Ptr data = std::make_shared<AsyncSenderData>(shared_from_this(),body,bClose);
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_sock->setOnFlush([data](){
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return AsyncSender::onSocketFlushed(data);
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});
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AsyncSender::onSocketFlushed(data);
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}
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string HttpSession::urlDecode(const string &str){
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auto ret = strCoding::UrlDecode(str);
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#ifdef _WIN32
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GET_CONFIG(string,charSet,Http::kCharSet);
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bool isGb2312 = !strcasecmp(charSet.data(), "gb2312");
|
||
if (isGb2312) {
|
||
ret = strCoding::UTF8ToGB2312(ret);
|
||
}
|
||
#endif // _WIN32
|
||
return ret;
|
||
}
|
||
|
||
void HttpSession::urlDecode(Parser &parser){
|
||
parser.setUrl(urlDecode(parser.Url()));
|
||
for(auto &pr : _parser.getUrlArgs()){
|
||
const_cast<string &>(pr.second) = urlDecode(pr.second);
|
||
}
|
||
}
|
||
|
||
bool HttpSession::emitHttpEvent(bool doInvoke){
|
||
bool bClose = !strcasecmp(_parser["Connection"].data(),"close");
|
||
/////////////////////异步回复Invoker///////////////////////////////
|
||
weak_ptr<HttpSession> weakSelf = dynamic_pointer_cast<HttpSession>(shared_from_this());
|
||
HttpResponseInvoker invoker = [weakSelf,bClose](const string &codeOut, const KeyValue &headerOut, const HttpBody::Ptr &body){
|
||
auto strongSelf = weakSelf.lock();
|
||
if(!strongSelf) {
|
||
return;
|
||
}
|
||
strongSelf->async([weakSelf,bClose,codeOut,headerOut,body]() {
|
||
auto strongSelf = weakSelf.lock();
|
||
if(!strongSelf) {
|
||
//本对象已经销毁
|
||
return;
|
||
}
|
||
strongSelf->sendResponse(codeOut.data(), bClose, nullptr, headerOut, body);
|
||
});
|
||
};
|
||
///////////////////广播HTTP事件///////////////////////////
|
||
bool consumed = false;//该事件是否被消费
|
||
NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastHttpRequest,_parser,invoker,consumed,*this);
|
||
if(!consumed && doInvoke){
|
||
//该事件无人消费，所以返回404
|
||
invoker("404 Not Found",KeyValue(), HttpBody::Ptr());
|
||
}
|
||
return consumed;
|
||
}
|
||
|
||
void HttpSession::Handle_Req_POST(int64_t &content_len) {
|
||
GET_CONFIG(uint64_t,maxReqSize,Http::kMaxReqSize);
|
||
|
||
int64_t totalContentLen = _parser["Content-Length"].empty() ? -1 : atoll(_parser["Content-Length"].data());
|
||
|
||
if(totalContentLen == 0){
|
||
//content为空
|
||
//emitHttpEvent内部会选择是否关闭连接
|
||
emitHttpEvent(true);
|
||
return;
|
||
}
|
||
|
||
//根据Content-Length设置接收缓存大小
|
||
if(totalContentLen > 0){
|
||
_sock->setReadBuffer(std::make_shared<BufferRaw>(MIN(totalContentLen + 1,256 * 1024)));
|
||
}else{
|
||
//不定长度的Content-Length
|
||
_sock->setReadBuffer(std::make_shared<BufferRaw>(256 * 1024));
|
||
}
|
||
|
||
if(totalContentLen > 0 && totalContentLen < maxReqSize ){
|
||
//返回固定长度的content
|
||
content_len = totalContentLen;
|
||
auto parserCopy = _parser;
|
||
_contentCallBack = [this,parserCopy](const char *data,uint64_t len){
|
||
//恢复http头
|
||
_parser = parserCopy;
|
||
//设置content
|
||
_parser.setContent(string(data,len));
|
||
//触发http事件，emitHttpEvent内部会选择是否关闭连接
|
||
emitHttpEvent(true);
|
||
//清空数据,节省内存
|
||
_parser.Clear();
|
||
//content已经接收完毕
|
||
return false;
|
||
};
|
||
}else{
|
||
//返回不固定长度的content
|
||
content_len = -1;
|
||
auto parserCopy = _parser;
|
||
std::shared_ptr<uint64_t> recvedContentLen = std::make_shared<uint64_t>(0);
|
||
bool bClose = !strcasecmp(_parser["Connection"].data(),"close");
|
||
|
||
_contentCallBack = [this,parserCopy,totalContentLen,recvedContentLen,bClose](const char *data,uint64_t len){
|
||
*(recvedContentLen) += len;
|
||
|
||
onRecvUnlimitedContent(parserCopy,data,len,totalContentLen,*(recvedContentLen));
|
||
|
||
if(*(recvedContentLen) < totalContentLen){
|
||
//数据还没接收完毕
|
||
//_contentCallBack是可持续的，后面还要处理后续content数据
|
||
return true;
|
||
}
|
||
|
||
//数据接收完毕
|
||
if(!bClose){
|
||
//keep-alive类型连接
|
||
//content接收完毕，后续都是http header
|
||
setContentLen(0);
|
||
//content已经接收完毕
|
||
return false;
|
||
}
|
||
|
||
//连接类型是close类型，收完content就关闭连接
|
||
shutdown(SockException(Err_shutdown,"recv http content completed"));
|
||
//content已经接收完毕
|
||
return false ;
|
||
};
|
||
}
|
||
//有后续content数据要处理,暂时不关闭连接
|
||
}
|
||
|
||
void HttpSession::sendNotFound(bool bClose) {
|
||
GET_CONFIG(string,notFound,Http::kNotFound);
|
||
sendResponse("404 Not Found", bClose,"text/html",KeyValue(),std::make_shared<HttpStringBody>(notFound));
|
||
}
|
||
|
||
void HttpSession::setSocketFlags(){
|
||
GET_CONFIG(bool,ultraLowDelay,General::kUltraLowDelay);
|
||
if(!ultraLowDelay) {
|
||
//推流模式下，关闭TCP_NODELAY会增加推流端的延时，但是服务器性能将提高
|
||
SockUtil::setNoDelay(_sock->rawFD(), false);
|
||
//播放模式下，开启MSG_MORE会增加延时，但是能提高发送性能
|
||
(*this) << SocketFlags(SOCKET_DEFAULE_FLAGS | FLAG_MORE);
|
||
}
|
||
}
|
||
|
||
void HttpSession::onWrite(const Buffer::Ptr &buffer) {
|
||
_ticker.resetTime();
|
||
if(!_flv_over_websocket){
|
||
_ui64TotalBytes += buffer->size();
|
||
send(buffer);
|
||
return;
|
||
}
|
||
|
||
WebSocketHeader header;
|
||
header._fin = true;
|
||
header._reserved = 0;
|
||
header._opcode = WebSocketHeader::BINARY;
|
||
header._mask_flag = false;
|
||
WebSocketSplitter::encode(header,buffer);
|
||
}
|
||
|
||
void HttpSession::onWebSocketEncodeData(const Buffer::Ptr &buffer){
|
||
_ui64TotalBytes += buffer->size();
|
||
send(buffer);
|
||
}
|
||
|
||
void HttpSession::onDetach() {
|
||
shutdown(SockException(Err_shutdown,"rtmp ring buffer detached"));
|
||
}
|
||
|
||
std::shared_ptr<FlvMuxer> HttpSession::getSharedPtr(){
|
||
return dynamic_pointer_cast<FlvMuxer>(shared_from_this());
|
||
}
|
||
|
||
} /* namespace mediakit */
|